Gate-valve.



D. HAMILTON.

GATE VALVE APPLICATION HLED SEPT. 10, 1914.

L1 3mm Patented Apr. 13, 1915.

! 2 1 2 BEEET8-SHEET 1.

n. HAMILTON.

GATE VALVE. 7 APPLICATION FILED SEPT- 10. 19x4.

Patented Apr. 13, 1915.

2 SHEETS-SHEET 2.

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mtomg a with an" upright annular flange 3, on its, v being internally threaded g for thereeeption of a circula r fiangedwhich 'depends V ttfheing provided with a jcoarsely threaded bored: 1

DAVID HAMILTON, OF GREENSBURG, PENNSYLVANIA.

GATE-VALVE.

ncense.

To aZZ whom it may concern;

Be it known that I, DAVID HAMILTON, a citizen of the United' States, residing at Greensburg, in the county of Westmoreland 5 and State of'Pennsylv'ania; have invented ,certain new and usefullmprovements in G ate valves; and I do declare the following to be a full," clear, and exact description of the invention, such as will enable others "skilledin the art to which it appertains to make-and use the same. v

My invention relates to improvements in valves and more particularly to those em ploying a vertically movable gate.

The main object of the invention is to provide an extremelysimple construction which will be highly efficient in operation and which will be well adapted to'the purpose for which-it is designed.

A further object of the invention is to provide a removable valve seat preferably formed of non-corrosive material whereby leakage around the gate or valve proper maybe' prevented should the valWe casing cQrrode. v

Yet another object is to construct the removable valve seat of a single sheet metal plate and to secure the same in position by the attachment of a hood or bonnet'through which the ralve stem is threaded.

lVith the above and minor objects in view, the invention resides in certain novel features of construction and combination, herein described and claimed and shown in the drawings wherein; p

Figural is a vertical section through a -va-lve constructed in accordance with my invention; Fig. 2 is 'a view taken at right angles to F ig. 1 as seen on the line 22 of said figure; Figi 3i's a horizontal section as seen on the line 3-3ofFig. 1; Fig. 4 is a perspective view of i the removable valve seat; Fig. 5 is an edge view of the gate orvalve proper;-l 1g..6 1s a top plan View thereof; and-Fig? is a rear view.

In the accompanyingillustration, I have shown my invention as "comprising a substantially cylindrical casing 1 having threaded openings 2 and 2" in 1ts opposite ends, said casing being likewise provided top, said flange from a .hood or bonnet-5, the latter Specification oi Letters Patent.

I 11 interengaging the ,t

likewise be sedn' that the 4 metal plate having Patented Apr, is, rare.

' v Application filed September 10, 1914. Serial No. 861 999.

Rising from the member 5is a sleeve 7 v whose upper end carries a stufiing box 8 which receives therein a cylindrical valve stem 9 having an operating eel 10 on its upper end, the'intermediate portion of the stemftlbeing provided with screw threads h reads in the bore 6, while the extreme lower end of said stem is provided with an annular external shoulder 12. The valve stem coacts with other parts of the device in a manner to be set forth,

.Disposed transversely Within the casing 1 and located adjacent the opening 2, is an upright transverse partition 13 whose lower portion is provided with an opening it, while spaced'inwardly from the partition 13 and having an opening 15 alining with the opening 14, is an inclined transverse par tition 16 which diverges upwardly from the said partition 13 and is integrally connected at its upper end with a comparatively short'upright wall 17 which lies parallel to the upper end of said partition 13.

By reference to the various figures of the a:

drawings, it will be seen that the casing 1 is provided with a rectangular opening 18 in its upper side, said opening registering" with the space beneath the bonnet 5. It :will

intermediate portions of the casing 1, at and bottom, are enlarged as indicated respectively at 19 and 20.

Projecting through the opening "18 and;

positioned in the space between the partitions 13 and 16, is a removable valve seat 21 formed of a single.

which is here shown as its opposite ends round ed as indicated at'22, one of said ends, designated by the numeral 23, lying in a horizontal plane and projecting laterally from an upright portion 24 of said plate, said portion contacting with the inner side of the partition 13and having an opening 25 alining with the opening 14-. The lower end of seen. at 26, said laterally bent portion lying within the enlargement 20 and having its free end continued upwardly as "at 27 and.

its opposite sides the portion 24 isbentlaterally inward as y continues vertically insubstantial contact with the well 1:? and is then hen' t laterally outwai'd as s eenfat said laterally bent yportion 'lying in the same horizontal plane with theportion 23.

-When the parts are assembled, the entire 1 removable valve seat is. positioned in the "casing through the opening 18 and its laterally bent ends 23 and 2 9 are located within the flange 3'and forced normallydownward by the depending'fiange 4 which is formed on the bonnet 5. By this construction it will ,be, seen thatthe valve seat is-normally held 1 in operative position but that the same may be readi'ly'removed when necessary. The

seat may'be formed of any suitablematerlal ibut i's'preferabl constructed ofnon-corrosive metal. f

' Coactingwith the removablevalve seat, is a substantially wedge shaped valve most clearly seen inv Figs. 5, 6 and 7, said valve comprising a fiat top plate '30, side plates31 depending therefromya-front' plate 32 like wise depending from said top plate and lying in an upright planeand a hollow intera nally threaded boss. 33' which rises from the plate 30, the various parts'of said valve be-.

ing preferably cast as a sing'leunit andformed of non-corrosive material. Byreference to the various figures of the draw ings, it will be seen that the edges of the side' platesB l, opposite the upright plate 32, incline as indicated at'34 and that said inclined edges contact with the inclined portion of the removable valve seat when the valve is positioned as seen in Fig. 1,-'in

which position the upright front plate 32' into the opening 2, through the alin'ed open-' ings in the two partitions and inthe-removable valve seat, said fluid being then discharged through the opening 2. .On the 1 other hand, it will be seen that the rotation of the wheel 10 in a.cl0ckwise direction will force the valve downwardly 'into contact j I claim 1s:

by a.

with its seat thus preventing the passage of fluid through the casing.

By constructing the various parts as above set forth, it will be seen that an extremely simple valve is provided, yet one whose eliici cy will not be impaired by corrosion of the interior of the casing. It will be'further noted that the removable valve seat may be replaced when the same becomes worn thereby greatly increasing'the life of the entire'valve structure.

Having thusdescribed my invention-,what

1. The combination with a valve casing having an opening in one side, an annular internally threaded flange surrounding said opening, and a pair of partitions within the caslng, said partitions being located. on opposite sides of the opening and converging toward the opposite side of the casing, a

. nut having a threaded engagement with the internally threaded annular flange, and-a valve located between said partitions; of aremovable valve seat interposed between the valve and the partitions, said valve seat being formedof a single plate bent substan-- tially upon itself to form a pair of converging plates, said plates contacting with jthe converging partitions and having their free ends passed through the opening in the casing and bent-laterally, said laterally bent ends contacting with the inner side of the nut, theconverging plates and the convergi'ng'partitions having alined openings.

'2. The combination *with a. valve casing having an opening in one side, an annular internally threaded flange surrounding said openlng, a valve in the casing, and a nut having a threaded engagement w th said ing andhaving a retaining member projecting through said opening and bearing against the inner ends of the nut. I

DAVID HAMILTON.

Witnesses:

J. Q. TRUXAL, JACOB TRUXAL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. i

,90 flange, of a removable valve seat in said cas- 

